performance propeller set designed for stable, efficient flight. Package includes two pairs (four propellers) sized for small RC craft and replacement needs. Key benefits Improved thrust and agility: 31 mm pitch and 40 mm diameter deliver stronger, more responsive acceleration and higher speed for lightweight builds. Lightweight for better efficiency: At 0.63 g each, these props reduce overall weight to extend flight time and improve maneuverability. Durable construction for demanding use: Built to withstand intense flying conditions and repeated impacts, so parts last longer between replacements. Stability and control across environments: Engineered to maintain consistent lift and predictable handling whether flying indoors or outdoors. Wide compatibility: Designed to integrate with a range of RC models, making installation simple for common small multirotors and micro craft. Technical specifications Diameter: 40 mm Pitch: 31 mm Weight: 0.63 g each Package: two pairs (four propellers) Compatibility and function Designed to work with various RC models where 40 mm diameter props are appropriate. Suited for small multirotors and micro drones that require lightweight, efficient propellers for tight handling. Intended as direct replacements or performance upgrades to improve thrust and responsiveness. Typical use scenarios FPV micro racing: Swap in these props to gain quicker throttle response and improved end speed during competitive runs. Freestyle or practice flights: Durable, lightweight props that hold up through aggressive maneuvers while preserving flight time. Parts replacement and repairs: Keep a set on hand for fast replacement after crashes to get back in the air quickly. What makes this propeller set stand out Balanced combination of diameter and pitch tuned for faster speeds and agile handling. Low mass per propeller to enhance flight efficiency without sacrificing control. Built to integrate with a variety of small RC platforms, providing a reliable upgrade or replacement option.